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Class Information
Number: 434/230
Name: Education and demonstration > Occupation > Keyboard operation (e.g., typing, key punching, etc.) > Means for selectively producing sound of character
Description: Subject matter including means having the sounds of characters recorded thereon, and means for reproducing the sound of a selected character either before or after the key therefor is depressed.

Patents under this class:

Patent Number Title Of Patent Date Issued

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